@TechConnectify Great video (and rant at the end!).
Panels are very cheap, but a decent charge controller and inverter isn't, and apparently inverters don't last forever - I've only had mine for a few years, so it's too early to tell how reliable they are.
Replacing inverters may be a "running cost" of the system if you have to use AC.
For that reason, I have been trying to find as many DC-powered products as possible, but it's quite hard to find non-IT appliances.
The only real DC kitchen devices you can get a fridges.
There are NO DC-powered cooking equipment.
The most powerful DC kettle I have found is 24V and 300W, which isn't great.
Everything else is just low power, small equipment.
Someone in the US is trying to make a battery-powered electric oven, so people can use them on 120V systems.
I bet it is phenomenally expensive!